Reamer



Oct. 16, 1923. 1,470,679

s. M. BELLRINGER I BEAMER Filed nec. 6.. 1921 S14/vento@ Sidney M. Bellrilnger j @l/mgm@ @Hoz nmz Patented Oct. 16, 1923.

` UNITED STAT-Es' Y Y1,410,619 PATENT omer..

SIDNEY M. BELLRINGER, F WAYNESBORO, PENNSYLVANIA, ASSIGNOR TO WAYNE TOOL MANUFACTURING COMPANY, OF WAYNESBOROL PENNSYLVANIA, A COR- PORATION OF PENNSYLVANIA.

BEAMER.

' Applicationled December'G, 1921. Serial Noi 520,404.

To all vwhom it may conce-mi' Be it known thatl I, SIDNEY M. BELL- RINGER, asubject of the King of Great Britain` residing at Waynesboro, in the county' device of the character described means forv In the drawings indicates the shank of a reamer carrying a. tool 11 held in placeby a set screw 12. This shank is hollow and screw threaded at its upper and lowerA ends. At an intermediate point it has an annular flange 13 forming a stop for the tool. v

Secured to the lower end by engagement with the lower screw thread is fin-elongated hollow extension 14-having slits 15 extending nearly the entire' length thereof, here shown as four in number. At the lower end of the extension is an unslitted portion forming an integral collar 16.

An expansion member 17 extends through the central openings fof shank 10 and extension 14. this member being adjustably secured to the upper screw thread of the shank. The central opening 0f the extension is tapered and the expansion member has a corresponding taper1 the opening in the collar 16 having sufficient clearance to permit substantial longitudinal movement of the expansion member.

In operation thepilot 14 is placed in a valve stem hole or similar opening and the member 17 is adjusted to spring outthe sides of the pilot to fit closely in the opening. The greatest expansion will be nea-r the center of the pilot which is, however, spaced far enough from the toolv to insure satisfactory performance of its centering function.

While I have shown a preferred form of my invention I do not limit myself either to the specific construction or the use described as other tools can be used therewith a'nd various modifications and details can be made without departing from the scope of my invention as indicated in the appended claims.

VHaving thus fullyv described my said iny vention, what I claim as new and desire to secure by Letters Patent, is:

1. A tool holder having. a shank and an expansible pilot, means engaging said pilot and adjustable to expand the same and means at the rear endvof the shank whereby the adjusting means can be actua-ted, substantially as set forth. v

2. A tool holder -having a shank and a hollow longitudinally slotted -pilot, and means in the pilot adjustable to expand the same and means at the rear end of the shank for operating the adjusting means, substantially as set forth.

3, A tool holder comprising a shank, a longitudinally slotted pilotat its forward end having a tapered axial opening and a correspondingly tapered adjusting member engaging said axial opening for varying the circumference of the pilot, and means forA moving the adjusting member said means being accessible from the rear of the tool holder without removing the tool from the work, substantially as set forth.

' 4. A toolv holder comprising a hollow shank internally threaded at both ends, a hollow slotted internally tapered pilot secured to the lower end of the shank, an expansion member threaded to the upper end of the shank and having a taper corresponding to that of the opening in the pilot, substantially as set forth. i

5. A tool holder compri. 'ng a shank, a seat to limit upward movement of the tool, a longitudinally slotted extension at the lower end of the shank, said shank and extens-ion being hollow and the hollow in the extension tapering toward the lower end, an expansion member extending from the upper end of the shank through said eX-v yania this 3rd day of December, A. D. tension, and 'means at the upper end of the nineteen hundred and twenty-One.

shank provided for lonfitudinal adjustment of the expansion member, substantially asv 'SIDNEY M' BELLRINGER [1" s'] 5 set forth. lWitnesses:

In Witness whereof, I have hereunto set WM. H. Srmmss, my hand and seal at Waynesboro, Pennsyl- R, H. FRAN'rz. 

